[Buildroot] Patch: new board Socrates Cyclone 5

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Hello,

On Tue, 1 Aug 2017 13:07:11 +0200, Jan Viktorin wrote:

> > On Tue, Aug 01, 2017 at 10:53:03AM +0200, Thomas Petazzoni wrote:  
> > > Hello,
> > > 
> > > On Tue, 1 Aug 2017 09:54:56 +0200, Lionel Flandrin wrote:
> > >     
> > > > Can I access this preloader.bin somewhere? I could check if there's
> > > > anything obviously special about it.    
> > > 
> > > The preloader.bin is part of the patch that Micha? sent:
> > > 
> > >   https://patchwork.ozlabs.org/patch/795350/    
> > 
> > Ah, I missed that, thank you for pointing it out.
> > 
> > It's definitely a mkpimage file. A simple way to validate that is to
> > check offset 0x40:
> > 
> > @0x40: [41 53 30 31]     Magic ("AS01")
> > @0x44: [00]              Version (v0 for Cyclone V)
> > @0x45: [00]              Flags
> > @0x46: [48 25]           Program length in words, so 38176B
> > @0x48: [00 00]           Not used ("spare")
> > @0x4a: [62 01]           Header checksum
> > 
> > Then at the end of the file you have a 4 byte CRC which I haven't
> > bothered to validate.
> > 
> > So nothing out of the ordinary as far as I can tell. In particular I
> > can't see anything ressembling a cryptographic signature at the
> > beginning or end of the file. Looks like a regular u-boot SPL to me.
> > 
> > I can't really say more about it, I don't have a Cyclone V board at
> > the moment. My advice would be to validate that the SPL generated by  
> 
> Hi, I've got a Socrates Cyclone V available and so I am able to test.
> If there are any patches to test, I can probably help.

Micha? original patch is at
https://patchwork.ozlabs.org/patch/795350/, but I dislike having the
prebuilt preloader.bin in the Buildroot tree. So if you can get that to
work without having a pre-built binary in U-Boot, that'd be great.

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com